OK, now that you have updated your post with more information, I understand better what you are looking for, something like the http://search.cpan.org/~simonw/Module-Pluggable-4.8/lib/Module/Pluggable.pm module might be a good solution.

Another possibility might be to write a module (or use an existing one such as File::Find::xxx) that explores your directory and possibly subdirectories and you can then pass callback functions to this module to do the functional part of the job. Or even possibly passing an array or a hash of callback functions to the module.

In reply to Re: Recommendations for adding plugin/addon capability to a program by Laurent_R
in thread Recommendations for adding plugin/addon capability to a program by atcroft

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post, it's "PerlMonks-approved HTML":


  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
  • Read Where should I post X? if you're not absolutely sure you're posting in the right place.
  • Please read these before you post! —
  • Posts may use any of the Perl Monks Approved HTML tags:
    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.